pi-zenmux-provider

Pi extension for using ZenMux models through ZenMux's OpenAI-compatible API.

The extension discovers the current ZenMux model catalog at startup, registers the models that Pi can use, and keeps a small offline catalog for unavailable or deliberately disabled network access.

Requirements

• Node.js 22.19 or newer
• Pi 0.80.7 or newer
• A ZenMux API key

Install

After the package is published:

pi install npm:pi-zenmux-provider

For a project-local install:

pi install -l npm:pi-zenmux-provider

To try the package without installing it:

pi -e npm:pi-zenmux-provider

Configure

Run /login in Pi and choose ZenMux AI, then enter a key from the ZenMux Pay As You Go page.

You can also provide the key through the environment:

export ZENMUX_API_KEY=your-key

PowerShell:

$env:ZENMUX_API_KEY = "your-key"

Select a model with /model. ZenMux model IDs use the provider/model form, such as openai/gpt-5.6-terra.

Use /zenmux to check credential resolution and send a one-token diagnostic request. A model can be supplied explicitly:

/zenmux openai/gpt-5.6-terra

How it works

ZenMux exposes the OpenAI Chat Completions API at https://zenmux.ai/api/v1. The extension uses Pi's built-in openai-completions transport.

The published package has no runtime dependencies. Pi provides the two @earendil-works/pi-* peer APIs through its extension loader, and Pi's package manager disables peer auto-installation for managed extensions.

At startup it requests GET /models, validates the response, removes duplicate or malformed entries, and registers chat-capable models. The catalog includes context windows, input modalities, reasoning capability, and token prices.

If discovery fails, PI_OFFLINE=1 is set, or no usable chat models are returned, the bundled catalog in src/fallback-models.ts is used.

Refresh that catalog from the current ZenMux response with:

npm run catalog:refresh

ZenMux supports reasoning_effort for reasoning models. Pi's thinking levels are mapped to the values supported by ZenMux. Tools, structured output, image inputs, streaming, and usage reporting use the normal Chat Completions request format.

Development

Install dependencies and run the complete local gate:

npm ci
npm run verify

The verification gate runs TypeScript checking, unit tests, package-content checks, packed-install checks, and a real Pi CLI model-listing smoke test.

Optional credentialed checks:

$env:ZENMUX_API_KEY = "your-key"
$env:ZENMUX_TEST_MODEL = "provider/chat-model"
npm run test:live

The live suite is skipped when ZENMUX_API_KEY is not set.

Publishing

The package does not publish automatically. Before a release:

npm run verify
npm pack --dry-run
npm publish --access public

Review the generated package contents and confirm that the npm account is logged in before publishing.

Security

Pi extensions run with the user's permissions. This package sends prompts, tool calls, and supported image inputs to ZenMux when a ZenMux model is used. It does not include telemetry or store credentials outside Pi's credential store and the ZENMUX_API_KEY environment variable.

License

MIT